It's as the title suggests, list the debut albums that have impressed you the most and had a genuine impact on you. I'm talking full-lengths (so no EPs etc.) and actual debuts, not just mainstream debuts. A cookie for anyone who doesn't list Hybrid Theory.
Black Sabbath- Black Sabbath Metallica- Kill Em' All Nirvana- Bleach Slipknot- Slipknot Mastodon- Remission System of a Down- System of a Down Korn- Korn Nine Inch Nails- Pretty Hate Machine Gorillaz- Gorillaz Tool- Undertow Primus- Frizzle Fry 311- Music Weezer- Weezer (Blue) Marilyn Manson- Portrait of an American Family Looks like my list is more set up for most impressive sophomore albums ever.
Arcade Fire - Funeral Black Flag - Damaged The Bronx - The Bronx Crystal Castles - Crystal Castles Down - NOLA Gallows - Orchestra of Wolves Joy Division - Unknown Pleasures Massive Attack - Blue Lines Mastodon - Remission My Bloody Valentine - Isn't Anything Nas - Illmatic The Pixies - Surfer Rosa Queens of the Stone Age - Queens of the Stone Age Weezer - Weezer (The Blue Album) The Wu-Tang Clan - Enter the Wu-Tang (36 Chambers)
Enter Shikari - Take to the Skies MGK - Lace Up Hollywood Undead - Swan Songs Bullet for My Valentine - The Poison Dead By Sunrise - Out of Ashes JulienK - Death to Analog Art of Dying - Vices and Virtues Alter Bridge - One Day Remains and of course...Hybrid Theory
(sorry if this picture is not allowed on this site.) and these are just some. Plus, besides Hybrid Theory, I decided to stick with artists whose first album is my favorite from them